JPH11132374A - Pipe fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new coupling of a one-push coupling for pipe. SOLUTION: A socket 10 provided with a sleeve 11 allowing the insertion of a pipe and one or a plurality of peripheral grooves are formed as water stop mechanisms on the outer periphery of this sleeve 11, O-rings 182 are fitted into the peripheral grooves, holding grooves 15 are successively arranged within the socket 10, a cap 17 supporting the holding grooves 15 is locked on the socket 10, at least one of the peripheral grooves is made to exist on the side deeper than the holding rings 15 and the socket 10 is provided with a confirmation hole visualizing the insertion at the tip of a pipe 30 on the side deeper than the peripheral groove on the side of this deep part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint, and more particularly to a new one-push type joint for a pipe.

[0002]

2. Description of the Related Art In recent years, resin pipes have been widely used not only in multi-dwelling houses but also in detached houses, and in such joints around the water, the occurrence of water leakage is not allowed at all and the connection is simple. There is a high demand for that. For this reason, many proposals have been made, but at present, no satisfactory joint has yet emerged.

Here, an example of a conventional pipe joint will be described.
A water stop ring such as an O-ring as a measure against water leakage and a retaining ring to complete the connection of the pipe are inserted into a socket serving as a main body of the pipe joint, and the pipe is inserted into the socket. The outer surface is bitten or tightened by the claw of the retaining ring, etc. and connected, and a water-stop ring such as an O-ring is inserted between the outer surface of the pipe and the inner surface of the socket to leak water. It has a structure that prevents occurrence.

[0004] However, one cause of water leakage is the imperfect insertion of a pipe. In the case of a one-push type joint, when a pipe is inserted, a hand is required to pass through a retaining ring and a water stop ring. 2 hits (impact)
There are times, but the illusion that the insertion has been completed by one touch is likely to occur. In addition, even when the joint for tightening the retaining ring is used in a narrow place, such as incomplete insertion or the like, it may cause water leakage. Therefore, it is only necessary to be able to confirm where the tip of the pipe is located.However, in the conventional structure, if a confirmation hole is made in the socket for visual inspection of the tip of the pipe, water leakage from this location can be avoided. Absent.

[0005]

SUMMARY OF THE INVENTION The present invention aims to improve the above-mentioned drawbacks of the conventional pipe joint.
It is an object of the present invention to provide a pipe joint in which a pipe can be easily inserted, and more particularly, to provide a novel pipe joint capable of forming a confirmation hole for visually checking an insertion position of a pipe tip in a socket.

[0006]

According to the present invention, there is provided a pipe joint comprising:
In order to solve the above problem, the following structure is adopted. That is, a socket having a sleeve that allows insertion of a pipe, a water stopping mechanism formed on the outer periphery of the sleeve, a holding ring, and a cap that is locked by the socket and supports or tightens the holding ring. In general, the water stopping mechanism is fitted in one or a plurality of circumferential grooves formed on the outer periphery of the sleeve and in the circumferential groove. Consisting of a waterproof ring.
Preferably, the water stop mechanism formed on the sleeve is present at least deeper than the holding ring.

[0007] More preferably, in the pipe joint having the above structure, a pipe insertion confirmation hole is formed in the socket.
It is preferable that it is formed at a position equal to or deeper than the position of the water stopping mechanism.

[0010] Here, with regard to a more specific structure of the present invention, a socket provided with a sleeve allowing insertion of a pipe, and one or a plurality of circumferential grooves as a water stop mechanism on the outer periphery of the sleeve. Formed, and an O-ring is fitted into the peripheral groove, and a retaining ring is sequentially arranged in the socket,
A cap for supporting them or tightening the holding ring is locked to the socket, at least one of the peripheral grooves is present deeper than the retaining ring, and the socket is provided on the socket deeper than the deeper peripheral groove. A pipe joint comprising a confirmation hole for visually checking insertion of a tip of a pipe.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The pipe joint according to the present invention has a sleeve for inserting a pipe integrally formed so that the pipe can be easily inserted, and the claws of a holding ring disposed in a socket have an outer surface of the pipe. It is fixed by biting into or tightening it. In particular, in the case where the position of the tip of the pipe is made visible by a confirmation hole formed in the socket, it is possible to easily find insufficient insertion of the pipe. It is completely gone.

The above feature is that the sleeve is integrated with the socket and a water-stopping mechanism such as an O-ring is provided on the outer periphery of the sleeve so that a water-stopping function is provided on the inner peripheral side of the pipe. Therefore, the confirmation hole at the tip of the pipe can be opened in the socket.

[0011] Preferably, at least one of the peripheral grooves formed in the sleeve and into which a water-stopping O-ring or the like is fitted is formed deeper than the holding ring. It is provided on the same side as this retaining ring or deeper than this, so that the completeness of the insertion at the tip of the pipe can be confirmed, and even if the insertion of the pipe is incomplete, It was decided that a leak could be found from the confirmation hole in the water pressure test without any dropout.

The socket and cap constituting the pipe joint of the present invention are usually made of gunmetal, but may be made of resin such as polybutene or polyvinylidene fluoride.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the pipe joint of the present invention will be described below in more detail. FIG. 1 is a half cut diagram showing a preferred example of the pipe joint of the present invention, and FIG. 2 is a half cut diagram when insertion with a pipe is completed.

Now, the pipe 30 is
Merge subjected to the ground - Bed 11 is integrally formed, in which with a circumferential groove 12 ₀ for O- rings fitted as water stop mechanism 12 on the outer peripheral. And this sleeve 11
The fluid passes through the inside of the pipe, and the pipe 30 is inserted into the outside. A male screw 13 is engraved on the outer periphery of the socket 10, and a holding ring 15 and a washer 16 having a claw portion 14 are arranged inside the male screw 13, and a cap 17 is screwed to the male screw 13 by supporting them. Assembled.

As described above, the pipe 30 is easily inserted by being guided by the sleeve 11 integrally formed in the socket 10.
The outer peripheral surface is bitten and fixed by the claw portion 14 formed inside the inside. The washer 16 is for holding this bite. The washer 16 may be integrated with the cap 17 in some cases.

[0016] In the illustrated example, Sri - outer periphery in a circumferential groove 12 ₀ for O- rings as water stop mechanism 12 has two blanking 11 (1
2 ₀₁ , 12 ₀₂ ), each of which is formed deeper than the holding ring 15.
Reference numeral 18 is a O- ring fitted in the circumferential groove 12 in the _0. The O- ring 18 may be provided a plurality (18 _1, 18 ₂₎ as also illustrated example even one, if it is used more, the much improved water-blocking. In this If Sri - circumferential grooves 12 ₀ formed in Bed 11 is of course plural rows formed.

The reason why a plurality of O-rings 18 are used is that the inner peripheral surface of the pipe (resin) 30 is not as dimensional accurate as the outer peripheral surface, and the water stopping performance of the O-ring 18 differs due to the variation. This is to completely stop the water. The O-ring 18 is preferably sprayed with a lubricant, for example, but is preferably coated with silicon.

When a plurality of O-rings 18 are used as described above, the O-ring 18 on the side that first contacts the pipe 30 is used.
₁ Sri than O- ring 18 ₂ deep side - it should be small projection amount from Bed 11 (D). The amount of protrusion (D) is the difference between the outer circumference of the O-ring 18 and the outer circumference of the sleeve 11, which is about 2 mm, preferably 1 mm.
When the thickness is 2 mm or more, the insertion force becomes 30 kgf or more, and the workability deteriorates.

Now, the pipe joint of the present invention has the socket 10
Is obtained by forming a hole 19 in the depth side than the peripheral grooves 12 _0,
This is a confirmation hole for visually observing the inside of the socket 10 from the outside. That is, this is for confirming the insertion state of the tip 31 of the pipe 30, and the position of the tip 31 of the pipe 30 can be confirmed, thereby preventing water leakage due to insufficient insertion and dropping out of the pipe 30. is there. It is preferable that a plurality of the confirmation holes 19 are provided around the socket 10.

The confirming hole 19 can be opened in the socket 10 because the inner peripheral surface of the pipe 30 is stopped by the O-ring 18, which is also provided in the socket 10 and the sleeve 11. And this one, this sleeve 1
1 is based on the feature that the outer peripheral surface and the inner peripheral surface of the pipe 30 are stopped by the O-ring 18.

In the above embodiment, the socket 10 and the sleeve 11 are formed as a single unit as shown in the figure, but the present invention is not limited to this example. Needless to say, it can be formed separately and integrated by post-processing such as welding.

Although the cap 17 is shown as being screwed into the male screw 13 of the socket 10, it is needless to say that the present invention is not limited to this.
A female screw may be provided inside the leading end and screwed to the female screw, or may be fixed with a stop ring or the like, and the fixing method is not limited.

[0023]

According to the pipe joint of the present invention, since the inside of the socket can be visually confirmed from the confirmation hole, insufficient insertion of the pipe can be confirmed and more reliable construction can be performed.

[Brief description of the drawings]

FIG. 1 is a half cut diagram showing one example of a pipe joint of the present invention.

FIG. 2 is a half cut diagram when insertion with a pipe is completed.

[Explanation of symbols]

10 ‥‥ socket, 11 ‥‥ Sri - Bed, 12 ‥‥ waterproofing _{mechanism, 12 0, 12 01, 12} 02 ‥‥ circumferential groove 13 is engraved on the outer periphery of ‥‥ socket the external thread, 14 ‥‥ claw portion , 15 ‥‥ retaining ring, 16 ‥‥ washer -, 17 ‥‥ cap, 18,18 _1, 18 ₂ ‥‥ O- rings, 19 ‥‥ confirmation holes, 30 ‥‥ pipe, 31 ‥‥ pipe tip.

Claims (6)

[Claims] 1. A socket having a sleeve for allowing insertion of a pipe, a water stopping mechanism formed on an outer periphery of the sleeve, a holding ring, and a socket which is locked and supported or held by the socket. A pipe joint characterized by comprising a cap to be tightened and a cap. 2. The pipe joint according to claim 1, wherein the water stopping mechanism comprises one or more peripheral grooves formed on the outer periphery of the sleeve and a water stopping ring fitted in the peripheral grooves. 3. The pipe joint according to claim 1, wherein the water stopping mechanism formed on the sleeve is located at least deeper than the holding ring. 4. The pipe joint according to claim 1, wherein a pipe insertion confirmation hole is formed in said socket. 5. The pipe insertion confirmation hole is formed at a position equal to or deeper than a position of a water stop mechanism.
The pipe joint according to the item. 6. A socket provided with a sleeve allowing insertion of a pipe, and one or more peripheral grooves formed as a water stopping mechanism on an outer periphery of the sleeve, and an O-ring is formed in the peripheral groove. And a retaining ring is sequentially arranged in the socket, and a cap for supporting them is engaged with the socket. At least one of the circumferential grooves is present at a deeper side than the retaining ring, and A pipe joint provided with a confirmation hole for visually checking the insertion of the tip of the pipe into the socket at a position deeper than the peripheral groove on the side.